engine TOYOTA PRIUS PLUG-IN HYBRID 2022 User Guide

922-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)Q
When in HV mode
The vehicle can be used in the same way as a standard hybrid
vehicle.
In HV mode, controls are primarily carried out as follows in accor-
dance with the driving conditions.
OThe gasoline engine stops
* when the vehicle is stopped.
ODuring start off, the electric motor (traction motor) drives the vehi-
cle.
ODuring normal driving, the gasoline engine and electric motor
(traction motor) are controlled effectively, and the vehicle is
driven with optimum fuel efficiency. Also, when necessary, the
electric motor (traction motor) operates as an electrical generator
to charge the hybrid battery (traction battery).
OWhen the accelerator pedal is depressed heavily, drive force
from both the gasoline engine and the electric motor (traction
motor) is used to accelerate.
*: When the hybrid battery (traction battery) requires charging or the
engine is warming up, etc., the gasoline engine will not automatically
stop. (P. 95)
Q
When braking (regenerative braking)
The electric motor (traction motor) charges the hybrid battery (trac-
tion battery).
The EV driving range can be extended by actively using this regen-
erative braking to store electricity in the hybrid battery (traction bat-
tery).
Moreover, as fuel consumption is also reduced when in HV mode,
the regenerative braking system can be used effectively.

932-1. Plug-in hybrid system
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
In order to make EV/EV City mode
available, charge the hybrid bat-
tery (traction battery) from an
external power source before
using the vehicle.
Even if charging the hybrid battery
(traction battery) has not been
completed, the vehicle can be
driven. However, if there is not
enough charge remaining, it is pos-
sible that the vehicle cannot be
driven in EV/EV City mode or the
EV driving range will become
shorter.
When driving with the gasoline engine stopped, a sound, which
changes in accordance with the driving speed, will be played in order
to warn people nearby of the vehicle’s approach. The sound will stop
when the vehicle speed exceeds approximately 25 km/h (16 mph).
Q Regenerative braking
O In the following situations, kinetic energy is converted to electric energy and
deceleration force can be obtained in conjunction with the rech arging of the
hybrid battery (traction battery).
• The accelerator pedal is released while driving with the shift position in
D or B.
• The brake pedal is depressed while driving with the shift posi tion in D or
B.
O While the GPF system (P. 508) is operating to regenerate the exhaust gas
filter, the hybrid battery (traction battery) may not be rechar ged.
Q EV driving range
O The EV driving range is displayed on the multi-information display etc.
( P. 215, 231, 238, 255)
O The EV driving range changes in accordance with the charge status of the
hybrid battery (traction battery), the speed of the vehicle, et c.
O Even if there is enough charge remaining in the hybrid battery (traction bat-
tery), EV driving may be canceled and both gasoline engine and electric
motor are used depending on the situation. ( P. 94)
Charging (P. 1 1 1 )
Vehicle proximity notification system

942-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)QAfter EV mode has switched to HV mode due to low hybrid battery (trac-
tion battery) charge
If the hybrid battery (traction battery) is regenerated by driving continuously
down a long slope, the EV driving range etc. will be displayed on the multi-
information display and EV mode will be automatically switched to.
If EV mode is not switched to even though EV driving range is being dis-
played, EV mode can be switched to by pressing the EV/HV mode selection
switch.
QRefilling fuel
Plug-in hybrid vehicles can be driven using electricity charged from an exter-
nal power source. However, as the gasoline engine is used depending on the
situation even if in EV mode, and the gasoline engine is provided on board as
a power source for driving in HV mode, it is needed to refueling the vehicle.
Check the fuel amount and refill immediately when the fuel level becomes
low. (P. 351)
QGasoline engine operation in EV mode
Even if there is a sufficient amount of electricity remaining in the hybrid bat-
tery (traction battery) and EV driving range (P. 215, 231, 238, 255) is being
displayed on the multi-information display etc., EV driving (driving using only
the electric motor) may be canceled and both gasoline engine and electric
motor are used depending on the situation (EV driving will be returned to
automatically after EV driving becomes possible again).
EV driving may be canceled automatically in the following circumstances:
OWhen vehicle speed is more than approximately 135 km/h (84 mph).
OWhen power is needed temporarily, for example when the accelerator pedal
is depressed firmly or when accelerating suddenly.
OWhen the temperature of the hybrid system is high.
The vehicle has been left in the sun, driven on a hill, driven at high speeds,
etc.
OWhen the temperature of the hybrid system is low.
OWhen the heater is switched on when the outside temperature is below
about -10C (14F).
OWhen the windshield defogger switch is pressed. (P. 527)
OWhen the system determines that the gasoline engine needs to be started.
The gasoline engine may also operate in circumstances other than those
listed above, depending on conditions.

952-1. Plug-in hybrid system
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)QConditions in which the gasoline engine may not stop
The gasoline engine starts and stops automatically. However, it may not stop
automatically in the following conditions
*:
ODuring gasoline engine warm-up
ODuring hybrid battery (traction battery) charging
OWhen the temperature of the hybrid battery (traction battery) is high or low
OWhen the windshield defogger switch is pressed. (P. 527)
*: Depending on the circumstances, the gasoline engine may also not stop
automatically in situations other than those above.
QIf the vehicle is not used for a long time
OThe 12-volt battery may discharge. In this event, charge the 12-volt battery.
(P. 594)
In order to prevent the hybrid battery (traction battery) from becoming
extremely low in charge, charge the hybrid battery (traction battery) from
external power source or start the hybrid system at least once every 2 or 3
months, and turn the power switch off after the gasoline engine has
stopped automatically. (If the gasoline engine does not start up even after
approximately 10 seconds have passed since the “READY” indicator came
on, the power switch can be turned to off without any further action.)
OWhen the vehicle is left with the charging cable connected, the electricity
consumption amount of the 12-volt battery increases due to controls, such
as the system checking, operating. When the charging cable is not needed,
immediately remove it from the vehicle.
OFor vehicles with solar charging system, please refer to P. 181.

962-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)QSounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to
move with the “READY” indicator is illuminated. For safety, apply the parking
brake and make sure to shift the shift position to P when parked.
The following sounds or vibrations may occur when the hybrid system is
operating and are not a malfunction.
OMotor sounds may be heard from the engine compartment.
OSounds may be heard from the hybrid battery (traction battery) when the
hybrid system starts or stops.
ORelay operating sounds such as a snap or soft clank will be emitted from the
hybrid battery (traction battery), behind the rear seats, when the hybrid sys-
tem is started or stopped.
OSounds from the hybrid system may be heard when the back door is open.
OSounds may be heard from the transmission when the gasoline engine
starts or stops, when driving at low speeds, or during idling.
OEngine sounds may be heard when accelerating sharply.
OSounds may be heard due to regenerative braking when the brake pedal is
depressed or as the accelerator pedal is released.
OVibration may be felt when the gasoline engine starts or stops.
OCooling fan sounds may be heard from the air intake vents. (P. 99)
QVehicle proximity notification system
In the following cases, the vehicle proximity notification system may be diffi-
cult for surrounding people to hear.
OIn very noisy areas
OIn the wind or the rain
Also, as the vehicle proximity notification system is installed on the front of
the vehicle, it may be more difficult to hear from the rear of the vehicle com-
pared to the front.
QWhen “Proximity Notification System Malfunction Visit Your Dealer” is
displayed on the multi-information display
The vehicle proximity notification system may be malfunctioning. Have the
vehicle inspected by any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer immediately.
QMaintenance, repair, recycling, and disposal
Contact any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer regarding maintenance, repair, recycling and disposal. Do
not dispose of the vehicle yourself.

972-1. Plug-in hybrid system
2
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
WARNING
QWhen using the hybrid battery (traction battery) charge mode
Observe the following precautions when using the hybrid battery (traction
battery) charge mode while parking.
Failure to do so may lead to death or serious health hazard, as the gasoline
engine operates when in the hybrid battery (traction battery) c harge mode.
O Do not stop the vehicle near flammable materials.
O Do not use the hybrid battery (traction battery) charge mode in a closed
area where ventilation is insufficient, such as in a garage or area with
snow buildup.

105
2
2-1. Plug-in hybrid system
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
Plug-in hybrid vehicle driving tips
XUsing EV mode and HV mode effectively
Primarily using EV mode when driving in cities and using HV mode
when driving on highways (or freeways) can help conserve fuel and
electricity. (P. 88)
XUsing EV City mode
When using EV City mode, the motor output is limited and the oper-
ation of the gasoline engine can be minimized. Therefore, the vehi-
cle can be driven with only electric motor (traction motor) in city
areas, etc. (P. 88)
XUsing Eco drive mode
When using Eco drive mode, the torque corresponding to the accel-
erator pedal depression amount can be generated more smoothly
than it is in normal conditions. In addition, the operation of the air
conditioning system (heating/cooling) will be minimized, improving
fuel and electricity economy. (P. 418)
XUse of Hybrid System Indicator
Eco-friendly driving is possible by keeping the Hybrid System Indi-
cator within Eco area. (P. 226)
XShift position operation
Shift the shift position to D when stopped at a traffic light, or driving
in heavy traffic etc. Shift the shift position to P when parking. When
using the N, there is no positive effect on fuel consumption. In the
N, the gasoline engine operates but electricity cannot be gener-
ated. Also, when using the air conditioning system, etc., the hybrid
battery (traction battery) power is consumed.
For economical and ecological driving, pay attention to the fol-
lowing points:

1062-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
XAccelerator pedal/brake pedal operation
ODrive your vehicle smoothly. Avoid abrupt acceleration and
deceleration. Gradual acceleration and deceleration will make
more effective use of the electric motor (traction motor) without
having to use gasoline engine power.
OAvoid repeated acceleration. Repeated acceleration consumes
hybrid battery (traction battery) power, resulting in poor fuel con-
sumption. Battery power can be restored by driving with the
accelerator pedal slightly released.
XWhen braking
Make sure to operate the brakes gently and a timely manner. A
greater amount of electrical energy can be regenerated when slow-
ing down.
XDelays
Repeated acceleration and deceleration, as well as long waits at
traffic lights, will lead to high fuel and electricity consumption.
Check traffic reports before leaving and avoid delays as much as
possible. When driving in a traffic jam, gently release the brake
pedal to allow the vehicle to move forward slightly while avoiding
overuse of the accelerator pedal. Doing so can help control exces-
sive electricity and fuel consumption.
XHighway driving
OControl and maintain the vehicle at a constant speed. Before
stopping at a toll booth or similar, allow plenty of time to release
the accelerator and gently apply the brakes. A greater amount of
electrical energy can be regenerated when slowing down.
OElectricity consumption will increase significantly when driving at
high speeds in EV mode. If there will be a long distance to the
next external charging point after leaving a freeway, it is recom-
mended to drive in HV mode while on the freeway and change to
EV mode after leaving the freeway.

1082-1. Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
XLuggage
Carrying heavy luggage will lead to poor fuel economy. Avoid carry-
ing unnecessary luggage. Installing a large roof rack will also cause
poor fuel economy.
XWarming up before driving
Since the gasoline engine starts up and cuts out automatically,
warming up is not necessary.
XWhile warming up the engine
The hybrid system output may be restrained.

109
2
2-1. Plug-in hybrid system
Plug-in hybrid system
Prius Plug-in Hybrid_OM_OM47E75E_(EE)
EV driving range
The value displayed on the multi-information display etc. (P. 215,
231, 238, 255) is estimated from the following information.
OThe amount of hybrid battery (traction battery) charge currently
remaining
OThe electricity consumption (the estimated distance that can be
driven in EV mode per unit of electrical energy) based on the
recorded value
OPast air conditioning system electricity consumption amount
The electricity consumption varies depending on how the vehicle is
driven. The vehicle automatically records the electricity consumption
when being charged and uses the electricity consumption for estimat-
ing the EV driving range. Therefore, the EV driving range displayed
when the hybrid battery (traction battery) is fully charged may differ
from the previous EV driving range depending on how the vehicle was
driven.
The EV driving range may change significantly with each charging
until the electricity consumption based on the recorded value is stable
(for approximately the first month or two). However, this does not indi-
cate a malfunction.
When the air conditioning system is turned on, the EV driving range
(with using the air conditioning system) is estimated based on the past
air conditioning electricity consumption amount considering that the
electricity consumption may become higher.
The EV driving range displayed on the multi-information display
etc. shows the reference distance that EV driving (driving using
only the electric motor) is possible, and the actual distance that
can be driven may differ from that displayed.
Even if the EV driving range is displayed, EV driving may be can-
celed and both gasoline engine and electric motor are used depend-
ing on the situation. (P. 9 4 )
Displayed value